Doorknob and lock set with inaccessible fastenings



Dec. 23, 1952 R c. CERF, JR 2,622,431

DOORKNOB AND LOCK SET WITH INACCESSIBLE FASTENINGS 2 SHEETS-SHEET 2 FIG. 7.

Filed NOV. 50. 1948 FlGtl l.

iNVENTOR RoaERr C. GERFJ.

WKW

ATTORNEY Patented Dec. 23, 1952 .DORKNOB AND LOCKSET WITH INACCESSIBLE FASTENINGS Robert C. Cerf, Jr., Los AngeIesfCalif., a'ssi'gnor to Hollymade Hardware "Manufacturing-Coinpany, Los Angeles, Calif., a'corporation Vof 'California Application November 30, 1948,SerialNo. 62,603

(Cl. '7G-448) 3 Claims.

rlihi's invention relates to door 'lock sets, and in particular to almob and lock set having no visiblyaccessible fastening means for the set 'on the doororf or the knobs on' the set.

One object ci the invention is to provide an irnproved' key andlrnob Voperable door lock set. Another object is to provide an outside knob ufor a door 'l'o'ck set whose fastening to the lock body is inaccessible from the outside. Another object is to provide adoor lock set with invisible fastening means. A further object is to provide a door lock set in which the outer knob Vfastening isinaccessible prior to the removal of the inside knob and its spindle. A further object is to provide means for attaching a cylindricaldoor `lock set to rdoors of vvarying thicknesses.

These and otherobjects vare attained by my invention which will be understood irom the following description, reference being made to the accompanying drawings in which:

Figure 1 is a plan view partly in section showing -my door lock'set applied to a door;

AFigure 2 is a side-elevational View partly in section taken at right angles to the View shown in Figure 1;

VFigure 3 is a cross-sectional view taken on the line-S--fS-of Figure 1;

Figure 4 is a cross-sectional view taken on the lined-4 of'Figure 1;

Figure 5 is a cross-sectional view 'taken on the line 5-5 `of Figure 1;`

Figure 6 is a perspective View of `the outside knob and spindle;

VFigure 7 is a perspective view of the inside knob and spindle;

Figure 8 is a perspective View of the turn button locking assembly;

VFigure 9 is a perspective view of the outside half of the retractor housing;

Figure 10 is a perspective view of the inside half of the retractor housing; and

'Figure' 11 is a plan view of the retainer disk.

Referring to the drawings, particularly Figures 1 .and 2, a preferred embodiment of my door lock set is shown as it is intended to be mounted in a doory the outside knob being shown to the left and the inside to the right. The latch bolt unit (shownalso in Figure 11) consists generally of a cylindrica'ily shaped' housing 2i! from which at the .outer end extends a bolt 2|. A coil spring 2 IA surrounds the latch bolt bar 22 and abuts the inner'end of the 'housing' 2i! to maintain the bolt normally in a projecting position. The inner end of theY bar '22 protrudes through the'opening 23 in the'end closing disk V2li and is provided with a pair of lugs `2li whichare-graspedby theopposed 2 edges of the slot 2.5 in the retractor 2. 'The 'attachment ears, '2 extending from 'the end "closing disk 223 are adapted toengage the edges '2801 the peripheral opening in the assembled retractor housing.

The retractor housing consists of relatively heavy `die-cast bodies including an outside half'3' an inside half -l which are heldA together by the screws 32 extending Afrom the countersunk holes 33 in the inside half SLinto threadedholes 34 in the bosses Sein the outside half '32. The two halves together form a 'hollow generally cylindrical body which is adapted to be fitted in a hole drilled in or through the ydoor D.

rEhe outside half .Se ci the retractor housing consists of a cylindrical wall 3tandran .end Wall Si which is of substantial thickness to provide a ooaxially disposed bearing hole 38 Vfor the spindle li attached to theoutside knob 1G. ,A longitudinal locking groove dfi is provided in the wall of the bearing hole 353 `for the purpose to be described later; vand a retainer slot 6.9 extending through from the exterior surface of. the'end wall 3l tothe bearing hole 33 is provided for a retainer la to hold the spindle i l in place in theouter half housing 3Q. Theouter or closed end of the half housing 3% is provided with an integral outwardlye-x tending ange 3S which adapted Yto .abut v the outer face of the door D adjacent the edges .of the mounting hole. Arosette having a hub 4i extending toward kthe outside'knob id is-attach'e'd to or-made integral with theconica'l outer face yi2 of the half housing 3G. As shown, thisconsists of a relatively thin sheet metal 'rosette spun 'onfthe conical surface 'G2 of the rigid end wall 3l, ythe peripheral edges 63 of the rosette sheet metal being turned over the'e'dge of the flange Sii. In the cavity of the outside half 39 of the retractorhousing, retractor guides Q5 are provided, integral with and extending from the inside surface t or the end wall 3l. Bosses 35 are provided inthe cavity of the outside retractor half housing. t@ for hold'- ing screws 32, .and another boss 5S opposite the opening Mier the retractor, has a semi-cylindrical seat 55A for the retractor 'guide piu` 'The cylindrical Wall 3G is 'provided with ari-opening :il through which in combination with `'the opening 53 in the half housing 3|, the end of `the `retractor 2S and the bar 22 may move. The attachment ears 21 of the latch bolt unitare slidingly engaged under the edges 23 of the wall it at the peripheral opening lll, and under the corresponding edges 54 in the wall 5d at the opening 53 in the inside half housing El, the sliding engagement permitting lateral adjustment between the latch bolt unit and the retractor housing (3) and 3|) corresponding to the disposition of the mounting holes in the door D,

The inside half 3| of the retractor housing consists of a cylindrical wall 50 with an end closure disk 5| having an axial bearing hub 52 extending toward the inside knob 95 from the disk 5|, said hub being adapted to serve as a bearing and centering means for the spindle 99 of the inside knob 95. A peripheral opening 53 coinciding with the opening 41 in the outerhalf housing 30 is provided, the edges 54, coinciding with the edges 28 in the outside housing 39 being adapted for engagement by the lugs 21 on the disk 24. Inside bosses 35A are provided for the countersunk holes 33 for the holding screws 32. Another boss 56 is provided opposite the opening 53 in which is provided a semi-cylindrical recess 56A for the retractor guide pin 64. Threaded holes 69 are provided on the face for the attachment of the rosette retainer ||1.

The retractor 28 consists of two parallel side walls 80 and a cross-partition member 6| at right angles therebetween, this partition member being provided with a center hole 62 through which the retractor guide pin 84 extends. The coil compression spring 53, mounted on the pin B, is adapted to normally hold the retractor 25 extended toward the combined opening 53 and d?, and the rollbacks 83, 19, and |03. The latch bar lug engaging edges 60A of the retractor 28 are formed by bending in the ends of the side walls 60 to form the slot 25 in which the lugs 29 on the latch bar 22 are engaged.

The outer knob is non-rotatably attached to an outer spindle 1|, provided with a rollback 19, and a key-actuated lock cylinder 12 (see Figure l) is operatively disposed inside an axial hole 13 in the outer face of the knob 10, said cylinder 12 protruding into the spindle 1|. The end of the lock cylinder 12 is provided with a rectangular socket 14 which is adapted to make operative connection with the end of a coaxial shaft 82 having a key-actuated semi-circular rollback 83 attached at the inner end thereof, ar-

ranged to reciprocate the retractor by contact l with the top surface of the partition 8|, this reciprocation being independent of other means of reciprocating said retractor. The shaft 82 is spaced axially within the spindle 1| by the spacer disk 84 and by the locking spacer disk 85, both slidably and rotatably mounted on the shaft 82 between the outer end stop 86 and the end spacer 81 attached to the opposite or inner end of the shaft 82, a compression coil spring 88 being arranged between the two spacer disks to normally hold them apart and to provide spring pressure against the movement of the locking spacer 85. The locking spacer disk 85 is provided with a peripherally extending locking tab 89 which is adapted to be normally engaged in the longitudinal locking groove 44 extending from the cavity face 45 for a portion of the length of the bearing hole 38. The spindle 1| is free to be turned in either direction for about one-quarter of a turn by the provision therein of the peripheral slot 15. This slot 15 is also adapted to receive the retainer 16 in the retainer slot 49, to secure the spindle 1| in the housing 39. The tubular spindle 1| is also provided with a longitudinal slot 11 leading from the inner end to the peripheral slot 15, allowing the entrance thereto of the locking tab 89 from the cavity side of the half housing 39 (during assembly or disassembly). |The extension of the longitudinal slot 'i1 opposite the peripheral slot 15 forms the locking notch 19 into which the tab 89 may be longitudinally pressed against the spring 88 by the turn button sleeve 90, the end 9| of which slides over the keyoperated rollback 83 and the end spacer 81, as will be more particularly described later.

The inside knob 95 is provided with a fixed tubular spindle 96, and has a central opening 91 in the front face of the knob adapted to receive a thumb turn button 98. The side of the knob opposite said opening 91 is provided with a hub 99 which covers a portion of the spindle 96. The tubular spindle 98, inside the knob, is provided with a bayonet type slot |00, which is connected to the free end of the spindle by the longitudinal solt l0 I, by which a bayonet slot follower tab ||4 is assembled in the bayonet slot |00. A peripheral keying slot |92 is also provided near the free end of the inside spindle 9B which is adapted to receive the spring retainer key 58 insertable in the slot 58A in the side boss 59 on the hub 52 of the inner half housing 3|. A rollback |03 is provided on the end of the spindle 96, adapted to engage the partition member 6| of the retractor to reciprocate it and the operatively connected latch bolt.

The means shown for at times locking the outside knob 10 against rotation consists of the turn button sleeve 90, whose inside end 9| is adapted to slip over the key-operated rollback 83 with its end spacer 81, the end 9| making contact with the face of the locking tab 89 to press the tab into the locking notch 18 of the spindle 1|, thus fastening the outside knob spindle 1| to the half housing 39. The turn button sleeve 90 is cut away at the opening |05 to avoid interference with the reciprocating movement of the retractor 26. The elongated hole |05 is provided through the wall of the sleeve 99 at the opening |05, through which the retractor guide pin 04 passes, this pin allowing only limited turning but the necessary functional longitudinal movement of the sleeve 90. The turn button sleeve 90 is swivelconnected at the end opposite 9| to the bayonet bar ||2, which terminates in the thumb turn button 98 which is positioned in the central opening 91 in the face of the inside knob 95. The swivel connection as shown consists of the swivel cup |08 which removably ts inside the sleeve 90, being held against removal by normal pulling by the dimple |09 of the cup |08 in the hole |01 in the sleeve 90. The hole ||0 in the end of the cup |08 is adapted to receive the narrowed end of the bayonet bar ||2, with Washers on either side of the end wall, and with the end of the bar enlarged to retain the washers.

The bayonet bar ||2 is provided at its intermediate position with a centering tab I3 adapted to turn inside the spindle 96 and with an opposite slot follower tab ||4 adapted to follow the bayonet slot |99 in the spindle 95, this follower tab ||l5 being introduced into the bayonet slot l0 through the longitudinal slot |0| -in the spindle 96.

When the thumb turn button 98 is pushed in and turned so that the tab H4 engages the bayonet slot notch, it locks the outside knob 10 and its spindle 1| to the half housing 30 and thereby prevents the operation of `the latch mechanism by the outside knob 19, while not interfering with the retraction of the latch bolt by use of the key K, and also not preventing the use of the inside knob for retraction of the latch bolt. The thumb turn button 98 remains in locking position until manually released, irrespective of the use of the key or the inside knob.

The housing for the lock mechanism is positioned between the faces of a door, in the circular mounting hole provided therethrough, by the flange 39 abutting the hole edges on one side of the door, and by the inner rosette retainer disk II1. The rosette retainer disk ||1 is provided with screw holes ||8 by which screws ||9 hold the flange 39 to the Wall of the inside half housing 3| in the threaded holes 66, the outer margin of the rosette disk I I1 engaging the edge of the hole in the door. By means of the screws IIB, the door may be securely clamped between the flange 39 and the disk I1.

The retainer disk I1 is provided with a window |23 which permits access to the hair pin spring of the spring retainer key 58, which rotatably holds the spindle 96 in the housing irrespective of the longitudinal position of the disk I I1 on the sleeve 52.

The inside rosette |20 having a central extended sleeve |24 adapted to telescope over the hub 99 of the inside knob 95, is fastened to the edge of the rosette retainer II1 by frictional engagement on the rosette flange |2|, and the rosette may be released by prying means applied at the notch |22, and access made to the spring key 58 by moving the rosette toward the inside knob 95 on its hub 99. When the spring retainer key 58 is released, the inside spindle and knob are released, and full access to the lock mechanism is attained from the inner side of the door. The screws may be removed to release the retainer disk II1, following which the body (3|) and 3|) with the outside knob 10 may be removed from the hole in the door. The outside spindle 1| may then be released by removal of the retainer 16. The removal of the body (30 and 3 I) from the hole in the door also disengages the tabs 16 from the edges 28, and releases the edges 60A from the lugs 29 on the latch bar 22.

The advantages of my invention will be apparent. The outer knob and its spindle are fastened to the heavy die-cast housing by key means which is wholly inaccessible while the lock body is in the mounting hole. The lock body is removable from the hole only after the inside knob and its spindle have been released from the housing, and after the retainer disk has been released from the body. The inside spindle with its knob is releasable only by displacing the inside rosette to gain access to the keying means holding the spindle to the housing. No mounting screws or other fastening means for the housing, or for the knobs on the spindles are visible when the set is assembled and mounted on the door and the outside knob cannot be removed except through removal of the entire lock body from the door.

I claim:

`1. In a combined knob and lock set for use on a door, a body comprising a key-end portion and a turnbutton-end portion, said two portions together forming a hollow cylindrical housing with integral closure pieces, said closure piece of said key-end portion being conical shaped and having a peripheral ilange adapted to engage the edge of the hole in the door in which said body is mounted, and also having an axial aperture forming a bearing for an outer knob sleeve; and said closure piece of said turnbutton-end portion having a tubular bearing sleeve extending oppositely from said key-end bearing aperture; a retainer disk larger in diameter than said cylindrical housing and having an axial aperture adapted to slide over said tubular bearing sleeve, said retainer disk being adapted to abut the face of the door opposite said peripheral ilange; fastening means accessible from the side of said disk opposite the key end of said housing adapted to hold said retainer disk to said body in clamping relation on the door in which said housing is mounted.

2. In a combined knob and lock set for use on a door, a body comprising a key-end portion and a turnbutton-end portion, said two portions together forming a hollow cylindrical housing with integral closure pieces, said closure piece of said key-end portion being conical shaped and having a peripheral flange adapted to engage the edge of the hole in the door in which said body is mounted, and alsoI having an axial aperture forming a bearing for an outer knob sleeve; and said closure piece of said turnbutton-end portion having a tubular bearing sleeve extending oppositely from said key-end bearing aperture; a retainer disk larger in diameter than said cylindrical housing and having an axial aperture adapted to slide over said tubular bearing sleeve, said retainer disk being adapted to abut the face of the door opposite said peripheral flange; fastening means accessible from the side of said disk opposite the key end of said housing adapted to hold said retainer disk to said body in clamping relation on the door in which said housing is mounted; a free rosette adapted to be removably attached to the outer rim of said retainer disk to conceal said fastening means, said rosette having a concentric hub adapted to telescope over the hub of an adjacent knob.

3. In a combined knob and lock set for use on a door, a body comprising a key-end portion and a turnbutton-end portion, said two portions together forming a hollow cylindrical housing with integral closure pieces, said closure piece of said key-end portion being conical shaped and having a peripheral flange adapted to engage the edge of the hole in the door in which said body is mounted, and also having an axial aperture forming a bearing for an outer knob sleeve; and said closure piece of said turnbutton-end portion having a tubular bearing sleeve extending oppositely from said key-end bearing aperture; a retainer disk larger in diameter than said cylindrical housing and having an axial aperture adapted to slide over said tubular bearing sleeve, said retainer disk being adapted to abut the face of the door opposite said peripheral flange; fastening means accessible from the side of said disk opposite the key-end of said housing adapted to hold said retainer disk to said body in clamping relation on the door in which said housing is mounted; and a fixed rosette affixed to said conical shaped part of said key-end portion of said housing, said xed rosette having a hub adapted to telescope over the hub of an adjacent knob.

ROBERT C. CERF, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 425,743 Briggs Apr. 15, 1890 1,355,123 Breul Oct. 12, 1920 1,724,630 Wilson Aug. 13, 1929 1,821,155 Hausmann Sept. 1, 1931 1,829,815 Schlage Nov. 3, 1931 2,076,125 Grimsrud Apr. 6, 193'1 2,297,077 schlage Sept. 29, 1942 2,307,110 Chesler Jan. 5, 1943 

